diff --git a/Tools/scripts/patchcheck.py b/Tools/scripts/patchcheck.py
--- a/Tools/scripts/patchcheck.py
+++ b/Tools/scripts/patchcheck.py
@@ -51,6 +51,20 @@ def normalize_whitespace(file_paths):
     result = map(reindent.check, (x for x in file_paths if x.endswith('.py')))
     return sum(result)
 
+@status("Checking for tabs in C files", info=lambda x: "%s files" % x)
+def check_tabs(file_paths):
+    """Report if any .c/.h file contains a tab"""
+    cfiles = (x for x in file_paths if x.endswith(('.c', '.h')))
+    result = 0
+    for filename in cfiles:
+        with open(filename) as fp:
+            for line in fp:
+                if '\t' in line:
+                    result += 1
+                    break
+    return result
+
 @status("Docs modified", modal=True)
 def docs_modified(file_paths):
     """Report if any files in the Docs directory."""
@@ -74,6 +88,7 @@ def main():
     file_paths = changed_files()
     # PEP 7/8 verification.
     normalize_whitespace(file_paths)
+    check_tabs(file_paths)
     # Docs updated.
     docs_modified(file_paths)
     # Misc/ACKS changed.